public void Return <T>(IEnumerable <ConcurrentBag <T> > items)
 => ConcurrentBagPool <T> .Return(items);
 public void Return <T>(ConcurrentBag <T> item)
 => ConcurrentBagPool <T> .Return(item);
 public void Return <T>(params ConcurrentBag <T>[] items)
 => ConcurrentBagPool <T> .Return(items);
 public ConcurrentBag <T> ConcurrentBag <T>()
 => ConcurrentBagPool <T> .Get();